Insecticide-treated bed nets (ITNs) are known to be highly effective in reducing
malaria morbidity and mortality. However, there is scanty information on actual
usage of owned nets which varies among households. Such variations may limit the
potential effect of nets and cause spatial heterogeneity on malaria transmission.
Likewise there is limited information and utilization of topographic parameters such
as the shape of the underlying valley ecosystem in identification of high-risk malaria
foci to help enhance surveillance and targeted vector control activities in regions
where they are most needed. The objective of this study was to determine the effect
of ITNs use, topography and targeted vector control on malaria transmission. The
study was done in; Iguhu, Mbale and Emutete in Vihiga and Kakamega counties, in
malaria hypo-meso-endemic highlands of western Kenya. All houses in study sites
were geo-referenced and mapped. Using a randomized-repeated cross-sectional study
design, residents of 300 households randomly selected from each site in Iguhu and
Emutete were interviewed for ITNs ownership/usage, their houses sprayed for vector
abundance and occupants screened of malaria during the dry and rainy seasons of
2009-2010. Association of topography and spatial distribution of malaria vectors and
infections were determined between broad ‘U’-shaped versus narrow ‘V’-shaped
valley ecosystems in the three sites. Baseline information from spatio-temporal data
above was used to identify intense transmission areas for target vector control using
Indoor Residual Spray (IRS) and Biological larviciding. Entomological and
parasitological data were used for impact evaluation. Data was managed in excel
spread sheets and analyzed by STATA software. Student t-test was done to
determine differences in adult vectors and larval densities while Chi-square test was
done to determine differences in occurrence of malaria infection prevalence.
Univariate and multivariate analysis of Turkey HSD test was done to determine the
most predictive independent variable for the occurrence of larvae, adult vectors and
malaria cases. Despite ITN ownership reaching more than 71%, usage was low at
56.3%. The proportion of non-adherence to ITN use was significantly higher during
the dry season than rainy season, 46.6% vs. 32.9% in Iguhu (χ2= 12.42, d.f. = 1, P
ETEMESI, A (2021). Effects Of Bednet Use, Topography And Targeted Vector Control On Malaria Transmission In The Highlands Of Vihiga And Kakamega Counties, Western Kenya. Afribary. Retrieved from https://afribary.com/works/effects-of-bednet-use-topography-and-targeted-vector-control-on-malaria-transmission-in-the-highlands-of-vihiga-and-kakamega-counties-western-kenya
ETEMESI, ATIELI "Effects Of Bednet Use, Topography And Targeted Vector Control On Malaria Transmission In The Highlands Of Vihiga And Kakamega Counties, Western Kenya" Afribary. Afribary, 27 May. 2021, https://afribary.com/works/effects-of-bednet-use-topography-and-targeted-vector-control-on-malaria-transmission-in-the-highlands-of-vihiga-and-kakamega-counties-western-kenya. Accessed 08 Dec. 2023.
ETEMESI, ATIELI . "Effects Of Bednet Use, Topography And Targeted Vector Control On Malaria Transmission In The Highlands Of Vihiga And Kakamega Counties, Western Kenya". Afribary, Afribary, 27 May. 2021. Web. 08 Dec. 2023. < https://afribary.com/works/effects-of-bednet-use-topography-and-targeted-vector-control-on-malaria-transmission-in-the-highlands-of-vihiga-and-kakamega-counties-western-kenya >.
ETEMESI, ATIELI . "Effects Of Bednet Use, Topography And Targeted Vector Control On Malaria Transmission In The Highlands Of Vihiga And Kakamega Counties, Western Kenya" Afribary (2021). Accessed December 08, 2023. https://afribary.com/works/effects-of-bednet-use-topography-and-targeted-vector-control-on-malaria-transmission-in-the-highlands-of-vihiga-and-kakamega-counties-western-kenya